한국연소학회:학술대회논문집

The Korean Society of Combustion (한국연소학회)
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Experimental Study on Laminar Lifted Methane Jet Flame Diluted with Nitrogen and Helium

  • Sapkal, Narayan (Pukyong National University, Department of Mechanical Engineering, Combustion and Propulsion lab.) ;
  • Lee, Won June (Pukyong National University, Department of Mechanical Engineering, Combustion and Propulsion lab.) ;
  • Park, Jeong (Pukyong National University, Department of Mechanical Engineering, Combustion and Propulsion lab.) ;
  • Kwon, Oh Boomg (Pukyong National University, Department of Mechanical Engineering, Combustion and Propulsion lab.)
  • Published : 2014.11.27
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Abstract

Laminar lifted methane jet flame diluted with nitrogen and helium in co-flow air has been investigated experimentally. This paper examines the role of chemistry, intermediate species responsible for stabilization of lifted flame. To elucidate the stabilization mechanism in lifted methane jet flames with Sc<1, the chemiluminescence intensities of $CH^*$ and $OH^*$ were measured using ICCD camera at various nozzle exit velocities and fuel mole fractions. It has been observed that the $OH^*$ species can play an important role in stabilization of lifted methane jet flame as they are good indicators of heat release rate which can affect on flame speed and increase stability through reduction in ignition delay time.

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